Flue structure for gas ranges



June 20, 1950 V ON 2,512,521

' FLUE STRUCTURE FOR GAS RANGES Filed June '7, 1948 5 Sheets-Sheet 1 June 20, 1 950 H. A. DAVIDSON 2,512,521

FLUE STRUCTURE FOR GAS RANGES Filed June 7, 1946 5 Sheets-Sheet 2 [N V EN TOR.

Jung 2% 1950 H. A. DAVIDSON zgmzfiz 11 FLUE STRUCTURE FOR GAS RANGES Filed June 7, 1946 5 Sheets-Sheet 3 4y fua v 65' n June 20, 1950 H. A. DAVIDSON FLUE STRUCTURE FOR GAS RANGES 5 Sheets-Sheet 4 Filed June 7, 1946 June 20, 1950 H. A. DAVIDSON FLUE STRUCTURE FOR GAS RANGES 5 Sheets-Sheet 5 Filed June 7, 1946 Patented June 20, 1950 FLUE STRUCTURE FOR GAS RANGES Herman A..Davidson, Detroit, Mich., assignor to Avco Manufacturing Corporation, a corporation of Delaware Application June .7, 1946, Serial No. 675,068

11 Claims. (01. 12639) The invention relates to cooking ranges and more particularly to flue structures for'venting the products of combustion from the broiler and oven compartments of the range.

One object of the invention is to provide a flue structure for venting hot air or gases from the broiler compartment and oven compartments which includes a flue inside of the structural wrapper of the range, and which baflles radiated heat, decreases the wall-temperature, and eliminates restriction of secondary air to the top burner box.

Another object of the invention is to provide a flue structure of this character which is simple in construction, adapted to :be readily assembled with the wrapper and liners for the cooking compartments, and which may be economically fabricated. a

Other objects of the invention will appear from the detailed description.

.Theinvention consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings:

Fig. 1 is a vertical longitudinal section taken on line I -l of Fig. 2 of a cooking range embodying the invention.

Fig. 2 is a vertical transverse section taken on line 22 of Fig. 1.

Fig. 3 is a perspective of the structural wrapper and the flue structure attached thereto.

Fig. 4 is a perspective of the liner for the baking compartment.

Fig. 5 is a perspective of the liner for the broiler compartment.

Fig. 6 is a sectional perspective illustrating the flue structure at the back of the baking compartment and the stack for hot air and gases.

Fig. 7 is a sectional perspective of the structural wrapper and the flue embodied therein.

Fig. 8 is a section taken on line 8 -8 of Fi 1.

Fig. 9 is a vertical section of a modified form of the invention.

The invention is exemplified in a range of the cabinet type and which includes a structural wrapper, a top burner box, a, over the wrapper, a broiler compartment 1) within said wrapper and below the top-[burner box at one side of the cabinet, a baking compartment 0 at the opposite side of the cabinet within the wrapper.

The body structure comprises awrapper of sheet metal, generally designated 20, which functions as an integral structural bottom, top and back. Wrapper 20 includes a bottom-wall 2|, a

back-wall 23, and a top-wall 22 all of which are integrally formed of a single sheet of metal. The broiler compartment b and the baking compartment c are disposed inside of the wrapper. The front margins of the top and bottom walls of the wrapper are rigidly vertically connected by posts 26. Top-wall 22 of wrapper 20 forms the bottom of the top-burner box or compartment a. Panels 21 of sheet metal form lower structural elements at the ends of the wrapper. A base panel 30 structurally connects the front ends of panels 21. Insulated end-panels 29 are secured to inturned flanges on wrapper 20, for closing the ends thereof. Channel bars 3| are secured on topof the ends of top-wall 22 of wrapper 20 and formtheends of the space above the wrapper, which extends over compartments b and c. A front panel 33 extends between and is secured to bars 3| for closing the space which includes the top-burner compartment a. above wrapper 20.

An aeration pan 35 which extends over the burner box is supported over the top-burner compartment by one of the end panels 3| and a central transverse bar 32 which is supported on the top of the wrapper. A lid 31 is suitably hingedto the range-body and is adapted to cover the ex-v posed portions of the burners in box a. Burners d are suitably supported in the top-burner box. A panel 39 closes the top of the space over the wrapper 20 at the right hand side of the body. A splashback 4| of sheet metal is supported on brackets 52 which are secured to the channel bars 3|.

The gbroiler compartment b is provided with a liner 43 which includes a top-Wall 44, side-walls 45, and a back-wall 46. A hinged door e forms the front of compartment 1) and provides for access thereto. A burner 'f is suitably supported inside of compartment 1).. The baking compartment is provided with a liner 4! which includes a top-wall 49, side-walls 50, and a back-wall 5|. A hinged door g forms the front of the baking compartment and provides for access thereto. A suitable burner h and bottom are provided for compartment 0. Liner 43 of the broiler compartment is supported vertically by a transverse bar 53 and a transverse plate E l-which are rigidly secured to the body-structure. Liner 41 for the baking compartment is supported vertically by a flxed transverse bar 52 and one of the lower-end panels 21.

A flue structure is provided for venting the compartments 1) and c. This structure comprises a flue 51 in the upper rear corner of wrapper 20, which is formed by said wrapper and a wall, in--;

an opening 64 for receiving hot air and gases from an opening in the back of the liner for the baking compartment 0. The upper rear corner of the baking compartment liner 41 is provided with an inset or recess consisting of andf conforming to and spaced from flue walls 58 and 59 formed by a vertical wall portion 73 and an inclined wall portion '14. The verticalwall portion 13 of the back of the oven liner is pmi vided with the opening 15 adapted to communicate with opening 64 in the flue wall 58. back-wall El of the bakingcompartment liner is spaced from theback-wall 23' of wrapper Zfland thel'iner is so secured byspacers fis which are secured'by bolts to the back-wall 23 of wrap- The upper rear corner of the liner for the broiler compartment b is provided'with a transvers e inset-or recess conforming to and spaced from" the vertical and'mclinedportions 58, 59 of flue 151-, being formed by a vertical upper wall portion 65 anda rearwardly and downwardly inclined'wall portion 66. Wall-portion 65 'isprovided with the opening B'lwhich registers with the opening-63 in the flue wall-58;

Kpackihg Hf ofasbestos rope fits between the flue-wallfifl and the wall-portion 73-around communicatingopenings Stand 15 for reducing'heat transfer between the flue wall and the baking compartment liner at: the openings; 'A similar packing interposed between the back-wall portion 65 and flue-wall 58 :for reducing heat transfer between theibroiler compartment liner and the, walls of flu'e 5'l; The I back -wall portion 45' or the-,broiler compartment liner is also supportedgjn spaced relationirom backgwall 2310f wrapper 2Q spacers It which are secured by qlt fw ai ac rwa A'stack 19 for ventingair or gases from fluenis mounted; on and supported fromthe portion- 0f back of the wrapper which, is disposed rear: wardly of the baking compartment. The hot air and gases pass into said stack through an openingBII in the upper rear corner of said wrapper.- This stack'is formed of side-walls 8 l-, a'-back-wall 82, a front-wall 83', and an inclined top-wall 84. In'the inclined front-wall 83 and below top-wall 84,; anopening is formed for venting the-gases from the stack l9through horizontal slots B'Iyin' thelfront-wall' of the splashback 41; The lower end ,of stack .13 is open to permit airin back of wrapper Zllto flow into' said stack which-receives the hot air and gases from the broi ler compartment liner 43 and the baking compartment liner 41 Insulating material 86; such as'asbestos rope, is interposed between the stack around itsopenin'gwhichcommunicates with slots 81' for reducing heat transfer to the splashback 41.

Air for supporting combustion at the burner forthe baking compartment c and the burner for broiler compartment b -enters wrapper 20 through openings 90 and St. The hot air and gases from the broiler compartment I are vented through openings 61 ,63 into the flue Slim the upper-rear corner of the wrapper, and the hot-air andgases from the baking compartment are vented through The openings 15, 64 into the flue 51. From flue 51 the hot air and gases are vented through opening in the upper rear corner of wrapper 20 into stack 19 from which they escape through slots 87 in the front of the splashback. The insets extending across the upper rear liners baflle the radiated heat inthe liners and make it possible to provide a fiue in the wrapper having suflicient area to reduce the wall temperature in the flue. Hot air and gases passing through the upper portion of stack 19 draw unheated air from the back oi the wrapper, through the open lower end of the stack to cool the hot air and gases discharged from the stack;

The rear of the top burner box below the aeration pan 35 is open for free entry of secondary air to the topburner box. Stack 19 being disposed in horizontal. ofiset relation with respect to the burner box, it causes no restriction of the flow of secondary air to, said box.

In the modification illustrated in Fig; 9; a stack 93 is secured to theupper rear cornercf wrapper- 20-at the rear of the' baking compartment'and the gases are discharged 'fromthe stack into an exhaust flue V 94. This construction isusable when the gases are-not exhausted from the stack;

through the 'splashback or the rangei not provided with a splashback;

Advantageousfl characteristics; of-- the venting structure described are that the flue 5"!- is disposed within the structural wrapper;- and the broiler compartment I liner 7 43 and baking; cornpartment liner 41*areirecessed for the disposal of flue 5'1 Withinthe; wrapper; the back walls-oi;

the liners are spaced from the walls of flue 5] and back wall-i tfflot wrapper 20 and insulation is provided aroundthe communicating openings be ee the l e n sa d fl e The h lan gases are vented from the upperrear corner of the wrapper into the stack- 19 into which cool air ro a acls; 'fi c w p er Pa s ic l. hot nd ea es efqre t e re c a ed f m the stack. The insets in the linersbafiie radiated hea auditl s a eufii etarea r e r a m ci emr raturex t e. l s:. th fluci' thewrapper. The flue structureproduces no restriction in the flowpf secondary-air to-the;top burner box; is simple in construction, and can be fabricated at a low cost.

The vention i m-1 0s tcx e unders o d s mi ed l e d ta ses e s nefii he l may -ataifled within the scope of the appended claims without departing from the spirit' and scopelofthe invention.

Having. ns described the, invention what I aim i l ew nd-.d siret cesecure b et r Patent pisi 1 A 31 554 93491" Bi a air: p 9 ,13 156 arate cooking, I com part!nents, each incluc ling a backuanoL a top, a surrounding wallextending around the top and back of both of said comp art-r ments, atop-burner box overlying-the .top ofJthe surrounding wall said wall being sp aeed from said liners at; theirear'anda top of. saidl liners and providing-.an-zair chamher..between-saidrlinersand said; wall, -a structure, for venting esaid; compartv mentsdisposed in said air chamber forming a cross-flueonthe'insideoi the upper reancorner of the surrounding wall; thebaok-of the liners and the -cross-flue "having Y openings ooinii iunicativ ely connecting the compartments and} the essence, andaniupwardly e t'ending-flueon-the when: "pre rr n well iie t with the cross-fluef'said surrounding wall for-mmafia-await common both-to. said cross-flue and said upwardly extending flue;

arrange comprising a pair of liners for separate' 'cooking compartments, each including a back an'd' a-top, 'a'surrounding wall extending around the top and back-of-both of said compartments and spaced therefrom, a top-burner box overlying the top of the surrounding wall, a structure for venting said compartments disposed inthe'space between said liners and said surrounding-walL' formi'ng a cross-flue on the inside of the upper rear corner of the surrounding wall, the.

liners being spaced'from the top and back of the surrounding wall, means communicatively connecting the compartments and the cross-flue, and an upwardly extendingoutletiflue on the outside of the surrounding wall communicatively connected to the cross-flue, said surrounding wall forming a wall common both to said cross-flue and said -upwardly extending flue.

- 'BL A1range comprising a pair of liners for separ'ate cooking compartments, each including a back and-a top, a surrounding wall extending aroundthe top and back of both of said'compartments and spaced therefrom, a top-burner box overlying the --top of the surrounding wall, a structure for venting said compartments disposed in the space between said liners and said surrounding wall, forming a cross-flue on the inside of the upper rear corners of the surrounding wall, the back of the liners and the flue having openings communicatively connecting the compartments, and the cross-flue, insulation around said openings, and an upwardly extending flue on the outside of the surrounding wall communicating with the cross-flue, said surrounding wall forming wall common both to said cross-flue and said upwardly extending flue.

4. A range comprising a pair of liners for separate cooking compartments, each including a, back and a top, a surrounding wall extending around the top and. back of both of said compartments and spaced therefrom, a top burner box overlying the top of the surrounding wall, a structure for venting said compartments disposed in the space between said liner and said surrounding wall, forming a cross-flue on the inside of the upper rear corner of the surrounding wall, the back of the liners and the cross-flue having openings communicatively connecting the compartments and the cross-flue, the surrounding wall having an outlet in its upper rear corner, and an upwardly extending flue on the outside of the surrounding wall, communicating with said outlet, and in back of and above one of the compartments, said surrounding wall forming a wall common both to said cross-flue and said upwardly extending flue.

5. A range comprising a pair of liners for separate cooking compartments, each including a back and a top, a surrounding wall extending around the top and back of both of said compartments and spaced therefrom, a top-burner box overlying the top of the surrounding wall, a structure for venting said compartments disposed in the space between said liners and said surrounding wall, forming a cross-flue on the inside of the upper rear corner of the surrounding wall, the back of the liners and the cross-flue having openings communicatively connecting the compartments and the flue, the surrounding wall having an outlet in its upper rear corner, and an upwardly extending flue on the outside of the surrounding wall, communicating with said outlet, disposed in back of one of the compartments,

and having an open lower'end' fortheentry of air at the back of the surrounding Wall, said surrounding wall-forming a .wallncommon both to said cross-flue and said upwardly, extending flue.

6. A range-comprising a liner for a cooking, compartment, including a back and. a top, a sure;

rounding wall extending around the top and back of and spaced from the liner, top-burner box overlying the top of the surrounding wall, the.

liner having an insetat its upper rear corner,

a structure for, venting the compartment, 'form-.

ing a flue inside-of the upper rear, corner of, the

surrounding wall and. extending into theinset, the liner and the structurehaving means communicatively connecting the compartment anclv the flue, thesurrounding wall having anyoutlet in its upper rear corner, and an upwardlyextending fiuenon the outside of the surroundingwall and'communicating with said outleta;v

"7. A range comprising a liner for a'cooking compartment, including a back and a top, :a sur-- a flue inside of the upper rearcorner of the sur-,

rounding wall and extending into the inset, means communicatively connecting the compartment and the flue, insulation means around said connecting means, the surrounding wall having an outlet in its upper rear corner, and an upwardly extending flue on the outside of the surrounding wall and communicating with said outlet.

8. A range comprising a liner for a cooking compartment, including a back and a top, a surrounding wall extending around the top and back of and spaced from the liner, a top-burner box overlying the top of the surrounding wall, the liner having an inset with a vertical portion and an inclined lower portion at its upper rear corner, a structure for venting the compartment, forming a flue inside of the upper rear icorner of the surrounding wall and extending into the inset, means communicatively connecting the compartment and the flue, the surrounding wall having an outlet in its upper rear corner, and an upwardly extending flue on the outside of the surrounding wall and communicating with said outlet.

9. A range comprising a liner for a cooking compartment, including a back and a top, a surrounding wall extending around the top and back of and spaced from the liner, a top-burner box overlying the top of the surrounding wall, the liner having an inset with a vertical portion and an inclined lower portion at its upper rear comer, a structure for venting the compartment forming a flue inside of the upper rear corner of the surrounding wall and having a vertical and inclined lower portion extending into the inset, means in the vertical portion of the inset of the liner and the structure having openings communicatively connecting the compartment and the flue, the surrounding wall having an outlet in its upper rear corner, and an upwardly extending flue on the outside of the surrounding wall and communicating with said outlet.

10. A range comprising a pair of liners for separate cooking compartments each including a back and top, a surrounding wall extending around the top and back of both of said compartments, a top burner box overlying the top of the surrounding wall, a housing disposed intermediate 

